Cosmo CRKL Quick Manual

5-Zone UFH Control Box
Modell: CRKL
Quick Guide
COSMO GmbH
Brandstücken 31
22549 Hamburg
info@cosmo-info.de
www.cosmo-info.de
Sept 2023
V004
I N T R O D U C T I O N
The CRKL extension module control box is an element of the underfloor heating / cooling
control system. The control box allows you to control 5 different zones. Number of controlled
zones can be increased up to 15 zones by connecting CRKL extension modules to the CRKL
unit which is equipped with a module system that controls the source of heating and cooling.
Each individual zone can be operated by one thermostat. Thermostat which require 230V
power supply have to be powered directly from control box. The spring clamps provide quick
and convenient wiring connections. The control box is designed to work with NC (normally-
closed) type actuators. It is recommended to mount it on a surface or on a DIN rail.
P R O D U C T C O M P L I A N C E
This product complies with the essential requirements and other relevant provisions of the
following EU Directives: EMC 2014/30/EU, Low Voltage Directive LVD 2014/35/EU and RoHS
directive 2011/65/EU.
S A F E T Y I N F O R M A T I O N
Use in accordance with current national and EU regulations. Device is intended for indoor
use only in dry conditions. Product for indoor use only. Installation must be carried out by a
qualified person in accordance to current national and EU regulations. Before attempting to
setup and install, make sure that the devices is not connected to any power source. Incorrect
installation may cause damage to the devices. The CRKL should not be installed in areas
where it may be exposed to water or damp conditions.
T E C H N I C A L I N F O R M A T I O N
Power Supply 230 V AC
Total Load Max 1 A
Outputs Actuators (AC 230V)
Dimensions [mm] 270 x 110 x 55
C O N T R O L B O X D E S C R I P T I O N
1. Cartridge fuse 5 x 20 mm T2A
2. Power supply
3. NSB (Night Set Back reduction) function
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WARNING! DO NOT connect power supply to the CRKL power supply input when it is connected together with another CRKL.
CRKL power supply input have to be used only when control box extension works as standalone device.
1 . F U S E
Note: Replacement of the fuse to be carried out only when the control box is
disconnected from power supply (230 V ~).
Main fuse is located under the housing cover next to power supply terminals and secures the
control box and the devices connected to it. Use ceramic tube slow blow 250 V ROHS fuses
(5x20 mm) with nominal max current 2A. To replace fuse remove the fuse holder with a flat
screwdriver and pull out the fuse.
2 . P O W E R S U P P LY
Power supply for control box is 230 V ~ 50Hz.
Three wire installation should be made in
accordance with the current applicable
regulations.
The red LED will illuminate
inidicating that the control box
is connected to the power
supply.
230 V AC
L
N
4. Actuators output connections (AC 230V)
5. Thermostats input connections
6. CRKL extension input
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3 . N S B ( N I G H T S E T B A C K R E D U C T I O N ) F U N C T I O N
The NSB (Night Set Back) function enables you automatically reduce the setpoint temperature
on non-programmable thermostats via programmable thermostat connected to the same
control box or an extension module. NSB function changes comfort to economic setpoint
temperatures for each thermostat individually. The programmable thermostat, e.g. installed
in the living room, sends a signal to the non-programmable thermostats through a control
box (by wires). Then, the non-programmable thermostats automatically reduce the setpoint
temperature according to the value set on them. The NSB terminal is marked with the clock
icon - all NSB terminals are connected together within control box. The NSB function works
only in a 4-wire installations (see connection diagrams).
4 . A C T U A T O R S C O N N E C T I O N
Actuators wires should be plugged into the spring clamps of the respective zones. Maximum
current load for each zone is designed to handle up to 6 actuators with a power of 2W each.
With more actuators in one zone, an additional relay should be used to make sure that
actuators output will be not overloaded.
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Note:
Depends on the
thermostat heating/cooling
state - 230 V AC may appear
on the actuators output.
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